Acasis OTG Charging 3 Ports OTG Cable Adapter,Micro USB Hub USB OTG Extension Adapter for Smartphone and Tablet,Charging Power,Cable Black (Micro OTG)

It charges. That's it. Tried 4 keyboards, a mouse, 10 or more flash drives. Tried everything in each of the 3 ports. Tried it on each of the 3 switch positions. Tried restarting both tablets and my phone. Nothing but charging on any of them.